Preparation and characterization of PPO/PS porous membrane for desalination via direct contact membrane distillation (DCMD)

Rahimnia, Rasoul; Pakizeh, Majid

doi:10.1016/j.memsci.2022.121297

Cited by 15 publications

(1 citation statement)

References 56 publications

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“…The TiO2 microflowers on its surface remained intact, and no noticeable morphology change or fouling layer was observed, even after 500 min of the MD operation (Figure 10c). The permeate flow reduction factor, introduced by Rahimnia [51], also known as the normalized flux decline (FDn) parameter, can be used to evaluate the influence of fouling on membrane performance in various geometries and configurations. Since no dedicated fouling experiment has been performed, FDn is defined as the following [52]:…”

Section: 7 For Peer Review 16mentioning

confidence: 99%

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

Alrefaai,

Othman,

Rava

et al. 2024

Ceramics

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In this numerical study, the performance of ceramic-based mullite hollow fiber (HF) membranes in a direct contact membrane distillation (DCMD) process was evaluated. Three types of membranes were tested: (i) hydrophobic membrane C8-HFM, (ii) rod-like omniphobic membrane (C8-RL/TiO2), and (iii) flower-like omniphobic membrane (C8-FL/TiO2). The CFD model was developed and validated with experimental results, which were performed over a 500 min period. The initial mass flux of C8-HFM was 30% and 9% higher than that of C8-FL/TiO2 and C8-RL/TiO2, respectively. However, the flower-like omniphobic membrane C8-FL/TiO2 had the lowest drop in flux, around 11%, while the rod-like omniphobic membrane C8-RL/TiO2 had a 15% reduction, both better than the 23% reduction in the hydrophobic membrane C8-HFM over the 500 min. The study also analyzed the impact of fouling by examining the variation in mass transfer coefficient (MTC) over time. The results indicated that the ceramic-based mullite HF membranes with TiO2 flowers and rods demonstrated a high resistance to fouling compared to C8-HFM. The modified membranes could find applications in the desalination and handling of seawater samples containing organic contaminants. The CFD model’s versatility can be utilized beyond the current investigation’s scope, offering a valuable tool for efficient membrane development solutions, particularly for challenges such as the presence of organic contaminants in seawater.

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Section: 7 For Peer Review 16mentioning

confidence: 99%

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

Alrefaai,

Othman,

Rava

et al. 2024

Ceramics

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Studying the effect of different pore‐formers on characteristics and separation performance of PCTFE MF membrane

Yari,

Pakizeh,

Dashti

et al. 2024

Polymer Engineering & Sci

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When fabricating polymeric membranes using the non‐solvent induced phase separation (NIPS) technique, the characteristics and performance of the resulting membranes are significantly influenced by the additives incorporated into the casting solution. In this study, polychlorotrifluoroethylene (PCTFE) microfiltration (MF) membranes were fabricated using different pore‐formers including organic solvents, inorganic salts, and polymers. PCTFE was used as an attractive polymer for the first time in the liquid filtration process. This is due to its favorable properties for MF membranes such as ease of processing, high mechanical robustness, and fouling‐resistance. Dimethylformamide (DMF), ethanol, NaCl, ammonium bicarbonate, and polyethylene glycol (PEG) were incorporated at 1–4 wt% concentration as pore‐forming agents into the PCTFE solution. The prepared membranes were characterized by scanning electron microscopy (SEM), water contact angle measurement, and their filtration performance was assessed by pure water permeability (PWP) measurement and separation of milk fat in a cross‐flow membrane module. From the results, the overall porosity, surface porosity, mean pore size, hydrophilicity, PWP, steady flux, and fat rejection were in the following order for the modified membranes: PCTFE/DMF > PCTFE/PEG > PCTFE/ethanol > PCTFE/ammonium bicarbonate > PCTFE/NaCl. Among modified membranes, the highest fat rejection (95.8%) was obtained for the 1 wt% DMF‐containing casting solution. The fat rejection of this membrane was slightly less than the neat PCTFE membrane (97.5%), but its steady permeate flux was more than twice that of the pure sample. Additionally, the anti‐fouling and mechanical characteristics of the membranes were also investigated to assess the suitability of PCTFE polymers for the MF process.Highlights MF process was conducted using novel PCTFE flat‐sheet membranes. The PCTFE membrane was prepared with different pore‐formers. Using different concentrations of pore‐formers affected the membrane structure. Using pore‐formers affected the PCTFE membrane performance.

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Surface regeneration of templated PVDF membrane for efficient microalgae-rich high saline aquaculture wastewater treatment in membrane distillation

et al. 2023

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Preparation and characterization of PPO/PS porous membrane for desalination via direct contact membrane distillation (DCMD)

Cited by 15 publications

References 56 publications

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

A CFD Analysis of the Desalination Performance of Ceramic-Based Hollow Fiber Membranes in Direct Contact Membrane Distillation

Studying the effect of different pore‐formers on characteristics and separation performance of PCTFE MF membrane

Surface regeneration of templated PVDF membrane for efficient microalgae-rich high saline aquaculture wastewater treatment in membrane distillation

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